CN107759054A - Thin glassware and its manufacture method - Google Patents

Thin glassware and its manufacture method Download PDF

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Publication number
CN107759054A
CN107759054A CN201710705409.7A CN201710705409A CN107759054A CN 107759054 A CN107759054 A CN 107759054A CN 201710705409 A CN201710705409 A CN 201710705409A CN 107759054 A CN107759054 A CN 107759054A
Authority
CN
China
Prior art keywords
glass
guiding piece
glassware
less
tape
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710705409.7A
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Chinese (zh)
Inventor
F·布莱斯福德
D·摩斯利
G·普弗兰兹内尔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schott AG
Original Assignee
Schott AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schott AG filed Critical Schott AG
Publication of CN107759054A publication Critical patent/CN107759054A/en
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
    • C03B17/06—Forming glass sheets
    • C03B17/067—Forming glass sheets combined with thermal conditioning of the sheets
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B15/00—Drawing glass upwardly from the melt
    • C03B15/02—Drawing glass sheets
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/037—Re-forming glass sheets by drawing
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B15/00—Drawing glass upwardly from the melt
    • C03B15/18—Means for laying-down and conveying combined with the drawing of glass sheets, tubes or rods
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
    • C03B17/06—Forming glass sheets
    • C03B17/064—Forming glass sheets by the overflow downdraw fusion process; Isopipes therefor
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
    • C03B17/06—Forming glass sheets
    • C03B17/068—Means for providing the drawing force, e.g. traction or draw rollers
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B29/00—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
    • C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
    • C03B35/16—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors
    • C03B35/18—Construction of the conveyor rollers ; Materials, coatings or coverings thereof
    • C03B35/181—Materials, coatings, loose coverings or sleeves thereof
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
    • C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
    • C03B35/16—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors
    • C03B35/18—Construction of the conveyor rollers ; Materials, coatings or coverings thereof
    • C03B35/183—Construction of the conveyor rollers ; Materials, coatings or coverings thereof specially adapted for thermal adjustment of the rollers, e.g. insulating, heating, cooling thereof
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
    • C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
    • C03B35/16—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors
    • C03B35/18—Construction of the conveyor rollers ; Materials, coatings or coverings thereof
    • C03B35/189—Disc rollers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Glass Compositions (AREA)

Abstract

A kind of glassware is proposed, it is while with prominent surface quality with very small thickness.Product is suitable as the cover glass of screen, capacitor, optics and micro optic components, filter glass, barrier layer and fingerprint sensor.In order to which article of manufacture uses special manufacture method, it avoids mechanical damage and scrambling.

Description

Thin glassware and its manufacture method
Technical field
The present invention relates to the method and apparatus for formed glass product, the glassware through shaping and the glass through shaping The purposes of product.Glassware especially glass tape or glass disc.
Background technology
In principle it is known in the art that manufacturing glass tape by stretching.Thus, WO02/051757A2 is disclosed It is used for the method and apparatus for manufacturing glass disc of the thickness less than 1mm.Glass tube down-drawing is described in the literature, and glass melts wherein Body is overflowed from stretched container by slit injector and is drawn into glass tape downwards.Make for vertically drawn glass band Use pulling roll.This is realized with the glass tape that thickness is 0.7mm.In addition disk roller or roller can be set, so as to transverse to band Stretch glass tape to direction.Guide body can be used in the region of slit injector, glass is under the stream of guide body both sides, so as to subtract The small warpage of glass tape.
The B1 of DE 1 596 484 also disclose that the apparatus and method for drawn glass band.This method is equally glass tube down-drawing. Guide body is used in the region of slit injector.Glass tape through shaping stretches via the roller of driving after the hardening.Borrow The glass tube down-drawing of guide body is helped to be also referred to as " new-type glass tube down-drawing ".In this application, term " drop-down " both includes the side with guide body Method also includes the method for no guide body.
US 3,338,696A describe so-called overflow fusion method, wherein, glass melt flow through in cross to Two longitudinal seamed edges of the stretch slot gradually to come to a point down and it is agglomerated into glass tape on the top of stretch slot.
US3,635,687A describe so-called stretching again or again pulling method, and wherein, glass tape is not directly Pull out from glass melt, but pulled out from glass. preform.That is, preformed member be clamped in upper end in device, part Ground is heated and stretched on the free end of preformed member, is stretched so as to the length of the preformed member.Rolling can be used this Wheel carrys out vertically tension belt.
A series of those skilled in the art's thus known different feasible schemes, for the formed glass in pulling method Band.For many years, pulling method sustainable development all the time and perfect, thus, can produce very thin glass, it is also referred to as now " ultra-thin glass ".The A1 of DE 10 2,014 100 750 describe the example developed at present in pulling method field again.Here, The thin glass of special high yield is realized by the optimization of the deformed area to preformed member.Although having been realized in success, Need the glassware thinner all the time with outstanding surface quality.
Pulling method of the prior art is it is generally known that in state-of-the-art method, the glass tape through shaping It must be formed and contacted with guiding piece in any way, for conveying glass.This guiding piece is, for example, roller, crawler belt or roller. It is also contemplated that holder or other guiding pieces, its influence the direction of glass conveying and/or speed (referring to US7,231, 786B2)。
Thin glass has the advantages of flexible and weight per unit area is small.But disadvantageously, small mechanical load ability and It is difficult to control surface quality.The characteristic parameter of surface quality especially roughness, warpage, collimation and TTV.It is especially extremely thin The mechanical stability of glass tape be those skilled in the art's facing challenges.The measure used in the prior art is application All the time softer material is used for the contact surface of guiding piece.Softer material has advantages below, and it does not damage glass tape directly, this Realize enough adhesion of the glass tape on guiding piece outside.Nevertheless, be still damaged all the time on glass tape, or even glass Glass band fractures and shears off.Thus, for a person skilled in the art challenge be can manufacture extremely thin glassware, this Had no problem for thicker glassware.It is special especially to manufacture glassware that is very thin, having very little warpage Difficult, and be impossible by method well known in the prior art.On the other hand, glass is thinner, it is more difficult to realize small warpage.
The content of the invention
It is therefore an object of the present invention to glassware is provided, although its thickness very little, meets in terms of surface quality Particularly severe requirement.It is a further object of the present invention to provide a kind of method and a kind of device, and it is prevented in pulling method to warp The glass tape of shaping causes to damage, and ensures the extraordinary surface quality of glassware simultaneously.
The object implementatio8 that the purpose passes through Patent right requirement.
Glassware
The present invention relates to width from 10 to 1000mm, thickness is from 1 to 150 μm and with least one fiery (method) polishing The glassware on surface, wherein, glass has maximum 2000 μm warpage and the Knoop hardness less than 820.Preferably implementing In mode, width is at least 50mm, at least 100mm or at least 200mm.Width be preferably not to be exceeded 800mm, especially 700mm, 600mm, 450mm or 304.8mm value.
But it is 50 μm or smaller of glass to manufacture glassware, especially thickness of glass that thickness of glass is 150 μm or smaller Glass product is especially difficult, because material is very easy to fracture when being contacted with means of transport.In order to control glass tape characteristic, such as thickness Degree and warpage, especially from thermoformed areas up to the reliable and uniform transport that room temperature passes through smelting furnace is important.The transport should Typically without the blow-up of glass tape, peeling, crackle or unsteadily progress with time correlation.The transport is particularly by guiding piece Electrostatic effect is realized.The uniform transport causes the glass tape of non-warpage to realize desired cooling curve and by that can guide Guiding piece ensure, be below described in detail further.Learnt by the thin glassware manufacturer for listing specification table, with glass The thickness of product is less and less, is increasingly difficult to control warpage.This is also consistent with the experience of professional.
The glassware of the present invention it is preferably made according to the method for the present invention and can the method according to the invention manufacture.This The glassware of invention preferably has maximum 300 μm, especially maximum 200 μm warpage.This thickness that is particularly suitable for use in is 1 to 50 μm Glassware.In alternative embodiment, glassware preferably has maximum 2000 μm, especially maximum 1500 μm stick up It is bent.The warpage of glassware is especially preferably<1800μm、<1200μm、<1000μm、<800μm、<600 μm or<400μm.This is outstanding It is applied to thickness from>50 to 150 μm of glassware.Width until 1000mm is had according to the glassware of the present invention.
" glassware " of the present invention especially can be the glass tape as example obtained by pulling method.In an embodiment party In formula, glassware is the glass disc obtained particularly by segmentation glass tape." thickness " is especially put down in this manual Equal thickness.
By according to DIN 50441-5:2001 method detection warpage.The value is the chi of the irregularity degree of glassware Degree.Continue processing of the small warpage for glassware is necessary.This is especially suitable for thin glassware.
" surface through fire polishing " is the surface with especially small roughness.Pass through manufacturing method according to the invention energy Enough glassware of the manufacture with special surface characteristic.Glassware based on obtain its manufacture method and with it is at least one, Two outstanding surface through fire polishing.It is different from mechanical polishing, there is no polished surface in fire polishing, but by polished material Material is heated to it can smooth flow.Therefore, the cost for smooth surface being manufactured by fire polishing is significantly lower than manufacture through mechanical polishing The cost on surface.The roughness on the surface through fire polishing is less than the roughness on the surface through mechanical polishing.On according to the present invention Glassware, " surface " refers to upside and/or downside, i.e. two faces maximum compared to its lap.
The surface through fire polishing of the thin glass of the present invention, which preferably has, is up to 5nm, preferably at most 3nm and especially excellent Select maximum 1nm r.m.s. roughness (Rq or RMS).For thin glass, roughness depth Rt is preferably at most 6nm, more excellent Select maximum 4nm and particularly preferably maximum 2nm.Roughness depth is determined according to DIN EN ISO 4287.It is coarse according to the present invention Degree Ra is preferably smaller than 1nm.
In the case where mechanically polishing surface, roughness value is deteriorated.In addition, in the case where mechanically polishing surface in atom Force microscope (AFM) can be seen that polishing vestige.In addition, remaining mechanical polishing medium, such as diamond can be equally found out under AFM Powder, iron oxide and/or CeO2.Because after polishing, the surface through mechanical polishing must be cleaned all the time, so in glass The leaching for determining ion is produced on surface.Determine that the poor of ion can be detected by secondary ion mass spectrometry (ToF-SIMS). This ion is, for example, Ca, Zn, Ba and alkali metal.
The glassware of the present invention can be very thin.In a preferred embodiment, glassware has and is not more than 100 μm, no more than 50 μm, no more than 30 μm, the thickness no more than 20 μm or no more than 10 μm.
The method according to the invention makes it possible to obtain the glassware with particularly advantageous characteristic.The characteristic also includes TTV (integral thickness changes, total thickness variation) and the gradient (TTV per 25.4mm).Glassware is preferred With maximum 35 μm, it is especially maximum 30 μm, more preferably maximum 25 μm, especially maximum 15 μm, maximum 10 μm or maximum 5 μm TTV values are (according to SEMI MF 1530：2007).Glassware preferably have maximum 35 μm, it is especially maximum 30 μm, more preferably most Big 25 μm, especially maximum 15 μm, maximum 10 μm or maximum 5 μm of value of slope.
Method
The purpose realized by the method for formed glass product,
A. wherein, glass is at least partially heated temperature that glass can deform or at this temperature,
B. wherein, glass has the thin glass tape for being up to 150 μ m thicks by stretching to be molded into,
C. wherein, thin glass tape is transported out from the region to deform, and
D. wherein, thin glass tape forms with least one guiding piece contact at least in part, and the guiding piece is adapted to influence thin The conveying direction and/or speed of glass tape,
Wherein, guiding piece, which has, is less than 107Ohm*cm, especially less than 105Ohm*cm ratio resistance.
The thin glass tape obtained is divided into, especially cuts into smaller glassware, such as especially glass disc.
It has been found that the glass surface of glass tape during stretching by serious electrostatic load.This is in the prior art Cause the electrostatic load of guiding piece, be attached to so that environmental contaminants retain on guiding piece.The problem is in very thin glass It can not be prevented in the case of glass by avoiding environmental pollution, because glass filter can not be in no damage guide faces In the case of be removed again.This attachment causes the damage to new glass tape.In extreme circumstances, glass tape is kept attached in itself On guiding piece and be broken.The problem of damaged surfaces, becomes more fully apparent from the case where glass is especially soft.Thus, existing Have in technology all can not manufacture glassware of the thickness less than 30 μm by pulling method by guiding piece so far, can not especially manufacture Glassware without very little warpage.In one embodiment, the thickness that thin glass tape has is less than 50 μm, is especially less than 30 μm or less than 10 μm.
The temperature that glass can deform especially is up to 10 corresponding to glass viscosity8DPas temperature.In this viscosity Under glass can be molded into band, particular by one or more guiding pieces by the way that pulling force is applied on glass.In glass tube down-drawing Or glass melt in the case of overflow fusion method be present, melt has a corresponding temperature, and in pulling method again first compared with Preformed member is provided at low temperature, then heated.The temperature should not be too high.And it is preferred that not lower than 104DPas viscosity. Draw speed is had a strong impact on by gravity and obtains unsatisfied surface characteristic, especially big sticks up in the case that viscosity is too low It is bent.
From the region to deform out, once the glass further cools down or further cools down the glass especially glass To the temperature no longer to deform under the process conditions.The temperature is particularly in correspondence at least 1010DPas, preferably at least 1012dPas And particularly preferably at least 1014DPas viscosity.In the full-bodied situation, the surface of glass tape passes through used according to the invention The influence of guiding piece do not suffer damage.
Guiding piece is preferably roller, crawler belt, roller, clamper or its combination.Preferably, guiding piece has the basic of cylinder Shape.Especially guiding piece has at least one contact surface, and guiding piece contacts the glass through shaping by least one contact surface Band.The shaping to the contact area section of glass tape is preferably completed in Contact.That is, glass is in the state no longer to deform Under.Therefore, glass has at the moment for being scratched and damaging especially sensitive table by the pollutant being attached on guiding piece Face.
Glass is preferably selected from following group：Silicate glass, phosphate glass, borate glass, germanate or sulphur It is glass.It is particularly preferred that glass is borosilicate glass, alkaline silicate glass, earth-alkali silicate glasses, manosil AS Salt glass, titan silicate glass, lanthanum borate glass or fluorphosphate glass.
In embodiments of the present invention, can workhardness it is especially low and therefore to mechanism react it is especially sensitive Glass.In one embodiment, glass has less than 820, preferably shorter than 700, especially less than 560 or less than 400 (DIN EN ISO 4545-1:2015) Knoop hardness.The glassware of the present invention is obtained by this way.With such soft Glass N-FK51A, SF57N-FK51A that glass can be especially commercially available, SF57, SF57HTultra, N-PK52A, SF6,SF6HT、N-FK58、SF56A、SF1、SF4、P-SF68、SF2、SF5、N-PK51、N-PSK53A、F2、F2HT、SF10、N- SF66、P-SF67、F5、LF5、LF5HTi、LF1、LLF1HTi、SF11、K10、N-KF9、N-KZFS2、N-LASF9、N- LASF9HT、N-SF14、FK5HTi、K7、LAFN7、N-FK5、N-KZFS4、N-KZFS4HT、N-SF4、N-SF57、N-SF57HT、 N-SF57HTultra、N-BAK1、N-BAK2、N-K5、N-KZFS11、N-LAF2、N-LAF7、N-ZK7、P-SF8、P-SK57、P- SK57Q1、N-SF2、N-BALF4、N-SF1、N-SF10、N-BAK4、N-BAK4HT、N-SF6、N-SF6HT、N-SF6HTultra、 N-SK2、N-SK2HT、N-KZFS5、N-BAF51、N-BK10、N-LAK12、N-KZFS8、N-SK11、N-SSK2、N-SSK8、N- BASF2, N-LASF40, N-SK4, N-SK5 and
At least one guiding piece used according to the invention.In a preferred embodiment, glass tape should especially influenceed During speed, using at least two guiding pieces, especially at least two rollers or roller.It can also be used according to embodiment significantly more Guiding piece, especially up to 20, up to 16, until 12 or until 8 guiding pieces.Guiding piece is preferably applied to towards stretching side To drawn glass band.Have confirmed advantageously, be not by gravity, but in combination by guiding piece come drawn glass band.
In order to especially avoid the glass of shaping to be damaged in the case of the especially soft and/or extremely thin thin glass of glass Evil, makes guiding piece preferably have contact surface, and it has hardness (the DIN EN ISO 868 of 40 to 100 Shore As:2003-10, mark Inscribe (German)：Kunststoffe und Hartgummi-Bestimmung dermit einem Durometer(plastics and hard rubber-by hardometer (Shore hardness) determine identation hardness) (ISO 868：2003)；German version EN ISO 868：2003).The scope has proven to be favourable, so that it is guaranteed that the glass tape of shaping Abundant attachment on guiding piece.In the case of excessive high hardness, the risk of glass breakage improves while adhesive force reduces. In the case of hardness is less, the excessive and very thin glass of adhesive force may be damaged due to attachment.In principle, according to The present invention can be that the contact surface of guiding piece uses the material softer than in the prior art, because being kept away by small ratio resistance Excessive attachment of the glass tape of shaping on guiding piece is exempted from.Damaged surfaces can further be reduced by using softer roller Risk.
Guiding piece enables in particular to be made up of polymeric material, preferably by elastomer plastic, preferably by synthetic rubber, such as EPDM (Ethylene-Propylene-Diene rubber), FKM (fluorubber) or AC (ACM) are formed.Have confirmed advantageously, use Material of the temperature capacity up at least 150 DEG C.
The method of the present invention is pulling method, especially glass tube down-drawing, overflow fusion method or pulling method again.
In one embodiment, the electric charge of guiding piece is guided.This especially can be by making guiding piece, especially contact surface with leading Electric material, such as electric wire or conductive cable contacts are completed.Preferably, this is carried out by conduction brush or slider, its with guiding piece, Especially it is in contact with it face contact.
Cause when using the method according to the invention manufacture according to the present invention glassware even in thickness very Also there is especially small warpage in the case of small.Attachment and pollutant for glass tape optimize guiding piece as much as possible so that The influence factor of warpage is caused to minimize.
Device
According to the present invention, it is related to the device for formed glass product, it includes
A. at least one heating unit, it is used to glass being heated to temperature that glass can deform or is maintained at glass At this temperature,
B. at least one glass stock (Glasreservoir),
C. at least one forming area, wherein, by stretching can molding thickness be up to 150 μm of thin glass tape,
D. at least one guiding piece, it is adapted to the transporting direction and/or speed that influence thin glass tape,
Wherein, guiding piece, which has, is less than 107Ohm*cm, especially less than 105Ohm*cm ratio resistance.
In one embodiment, the device has stretching device again, and wherein, glass stock is from there through by glass Manufactured preformed member is formed or keeper of the device including being used for the preformed member made of glass.In another embodiment In, the device is pull device or overflow fusing device, and wherein, glass stock is formed by stretch slot.In pull device In the case of, stretch slot has slit injector in its lower end.The device can have one in the region under slit injector Or multiple guide bodies.
Heating unit is preferably selected from electrical resistor heating element, IR heating units, burner and laser and combinations thereof.
In addition, the device can have other components well known by persons skilled in the art, not being described in detail herein.It is outstanding to this It includes at least one cooling device.The also settable melting appartus in the case of glass tube down-drawing or overflow fusion method, such as melt Crucible or molten groove.
Purposes
According to the present invention also relates to the purposes of the glassware of the present invention, it is as screen, capacitor, optics and micro- Optical component, filter glass, the cover glass of barrier layer and fingerprint sensor.
Example
Comparative example
Such as the glass of Borofloat types being drawn on stretching device again described in the 750A1 of DE 10 2,014 100 Reach 10 μm of thickness.Stretching roller is used as guiding piece, it has>109Ohm*cm ratio resistance.Very thin glass occurs Band is seriously attached to the situation on guiding piece, so as to glass tape split each other and with the contact surface strong bonded of roller.
Example
As carried out identical experiment by following modification in a comparative example, ratio resistance is used for stretching roller< 105Ohm*cm material.The band that net thickness is 10 μm can be stretched herein, glass tape is torn or is drawn remaining adhered to On guiding element.Glass disc (about 150x150mm) has 1400 μm of warpage (Warp) made of band.
Brief description of the drawings
Accompanying drawing is not drawn by dimension scale.Accompanying drawing is only used for explaining protection object, does not limit protection object.Wherein：
Figure 1A shows the perspective view of the guiding piece in roller form according to the present invention；
Figure 1B shows the profile of the guiding piece in roller form according to the present invention；
Fig. 2 shows the section for the device according to overflow fusion method formed glass band；
Fig. 3 shows the section for the device according to glass tube down-drawing formed glass band；
Fig. 4 is shown for the section according to the device of pulling method formed glass band again.
Embodiment
Figure 1A shows the guiding piece in roller form according to the present invention.Roller has contact surface 11, and roller is by connecing Contacting surface is formed with the glass tape being molded and contacted.Contact surface 11 is a part for the outer cover 13 of guiding piece.Guiding piece need not must Fully it is made up of the material of outer cover 13.But can also make guiding piece that there is core 12, core can be by the material different from outer cover 13 Material is made.Advantageously generally, core 12 is formed by more more robust than outer cover 13 and elastic smaller material.The preferred material of core 12 Especially metal, such as steel.Alphabetical A shows the axis of symmetry through guiding piece.The guiding piece of the present invention can be with and without Drive device.Guiding piece is driven in a preferred embodiment, so as to which pulling force can be applied on glass tape by guiding piece.Excellent In the embodiment of choosing, guiding piece is carry-over pinch rolls.It can also be seen that, guiding piece has circular cross section in figure ia, such as according to this Invention is preferably.The make with circular cross section of guiding piece, especially preferred cylindrical make realize Uniformly in contact with and especially equably transfer force on glass tape.Thus the local overload of glass tape is avoided.On figure 1A embodiment also can correspondingly be applied on other guiding pieces according to the present invention and therefore be not limited to roller as guiding Part.
Figure 1B shows the cross section of the guiding piece according to the present invention.Contact surface 11, outer cover 13 and core have also been marked herein Portion's material 12.
Fig. 2 shows the section for the device according to overflow fusion method formed glass band.Arrow represents glass melt 14 Flow direction.Glass melt 14 is in stretch slot 20, glass melt via stretch slot seamed edge both sides overflow and Flowed away at stretch slot, so as to be agglomerated into glass tape 15 with gradually coming to a point towards stretch slot lower end.Guiding piece 10 is ensured through shaping The direction of glass tape 15 and speed are corresponding to prespecified.
Fig. 3 shows the profile for the device according to glass tube down-drawing formed glass band.Glass melt 14 is in stretching In the glass stock of the form of groove 20, glass melt 14 overflows via slit injector 21 from glass stock.Sprayed from clearance type After being overflowed in mouth 21, glass melt 14 is flowed in guide body 16, and glass melt flows down in guide body both sides, so as to guide Body lower end is combined into glass tape 15.Glass tape 15 is stretched downwards by the transmission of guiding piece 10.
Fig. 4 is shown for the schematic cross sectional view according to the device of pulling method formed glass band again.Device includes pre- Molding part 17, it is clamped in keeper 18.Preformed member has thickness D and is drawn into during this method less Thickness d.Preformed member 17 is pushed down on by the conveying for the guiding piece 10 being arranged in device upper area.In the bottom of device There are other guiding pieces 10 in region, it stretches downwards the glass tape 15 through shaping.The draw speed of lower guide 10 is more than The draw speed of upper guides 10, so as to what is reduced compared to preformed member 17 for the glass tape 15 through shaping Thickness.The deformation of preformed member 17 occurs in the region of deformed region 19.
Reference numerals list
10 guiding pieces
11 contact surfaces
12 cores
13 outer covers
14 glass melts
15 glass tapes through shaping
16 guide bodies
17 preformed members
18 keepers
19 deformed regions
20 stretch slots
21 slit injectors

Claims (14)

1. a kind of glassware, it has 10 to 1000mm width, 1 to 150 μm of thickness and the table of at least one fire polishing Face,
Characterized in that, the glass has maximum 2000 μm warpage and the Knoop hardness less than 820.
2. glassware according to claim 1, it is characterised in that with 1 to 50 μm of thickness and maximum 2000 μm, outstanding Its maximum 1500 μm warpage.
3. glassware according to claim 1, it is characterised in that there is the thickness and maximum more than 50 to 150 μm 300 μm, especially maximum 200 μm warpage.
4. according to the glassware any one of the claim, it is characterised in that have at least 50mm width.
5. a kind of method for formed glass product,
A. wherein, glass is at least partially heated temperature that glass can deform or at this temperature,
B. wherein, glass has the thin glass tape (15) for being up to 150 μ m thicks by stretching to be molded into,
C. wherein, the thin glass tape (15) is transported out from the region to deform, and
D. wherein, the thin glass tape (15) is formed with least one guiding piece (10) contact at least in part, and the guiding piece is fitted Group photo rings the conveying direction and/or speed of the thin glass tape (15),
Characterized in that, the guiding piece (10), which has, is less than 107Ohm*cm, especially less than 105Ohm*cm ratio resistance.
6. according to the method for claim 5, wherein, the thin glass tape (15) has less than 50 μm, especially less than 30 μm Or the thickness less than 10 μm.
7. the method according to claim 5 or 6, wherein, the guiding piece (10) is roller, crawler belt, roller or clamper.
8. the method according to any one of claim 5 to 7, wherein, methods described is glass tube down-drawing, overflow fusion method or again Secondary pulling method.
9. the method according at least one in claim 5 to 8, wherein, the guiding piece (10) has in 40 to 100 Xiao Hardness between family name A.
10. the method according at least one in claim 5 to 9, wherein, glass has less than 820, preferably shorter than 700 Or the Knoop hardness less than 560.
11. a kind of device for formed glass product, including：
A. at least one heating unit, it is used to glass being heated to temperature that glass can deform or glass is maintained at into the temperature Under degree,
B. at least one glass stock,
C. at least one forming area, wherein, by stretching can molding thickness be up to 150 μm of thin glass tape (15),
D. at least one guiding piece (10), it is adapted to the transporting direction and/or speed that influence the thin glass tape (15),
Characterized in that, the guiding piece (10), which has, is less than 107Ohm*cm, especially less than 105Ohm*cm ratio resistance.
12. device according to claim 11,
Wherein, described device is stretching device again, and wherein, glass stock is formed by preformed member (17), or
Wherein, described device is pull device or overflow fusing device, and wherein, glass stock passes through stretch slot (20) formation.
13. the device according to claim 11 or 12, or the method according to any one of claim 5 to 10, its In, the electric charge of the guiding piece (10) is guided, is come particular by the conduction brush or slider contacted with the guiding piece (10) Guide.
14. the purposes of glassware according to any one of claim 1 to 4, as screen, capacitor, optics With the cover glass of micro optic components, filter glass, barrier layer and fingerprint sensor.
CN201710705409.7A 2016-08-17 2017-08-16 Thin glassware and its manufacture method Pending CN107759054A (en)

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